I'm good, fixing the 'main' save allow the other saves to appear. Thankfully.

Removing the corrupt file did not allow the other saves to show.

Using winrar I have repaired the save and can see the contents. Factorio will not load it as the CRC check fails. As I can get the save/zip contents how do I go about moving the contents to a new valid zip?

I see many others over the years have experienced this. For no good reason, my zip is invalid, and I cannot open the zip in Windows either. Finished the session yesterday like normal.
Anyway, the 3 autosaves appear to be valid zips. When selecting / single player / load game only the corrupt save ...